Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client

Pull Ceph fixes from Sage Weil:
 "There is a lifecycle fix in the auth code, a fix for a narrow race
  condition on map, and a helpful message in the log when there is a
  feature mismatch (which happens frequently now that the default
  server-side options have changed)"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  rbd: report unsupported features to syslog
  rbd: fix rbd map vs notify races
  libceph: make authorizer destruction independent of ceph_auth_client

6 files changed, 55 insertions, 55 deletions

diff --git a/net/ceph/auth.c b/net/ceph/auth.c
index 6b923bcaa2a4..2bc5965fdd1e 100644
--- a/net/ceph/auth.c
+++ b/net/ceph/auth.c
@@ -293,13 +293,9 @@ int ceph_auth_create_authorizer(struct ceph_auth_client *ac,
 }
 EXPORT_SYMBOL(ceph_auth_create_authorizer);
 
-void ceph_auth_destroy_authorizer(struct ceph_auth_client *ac,
-				  struct ceph_authorizer *a)
+void ceph_auth_destroy_authorizer(struct ceph_authorizer *a)
 {
-	mutex_lock(&ac->mutex);
-	if (ac->ops && ac->ops->destroy_authorizer)
-		ac->ops->destroy_authorizer(ac, a);
-	mutex_unlock(&ac->mutex);
+	a->destroy(a);
 }
 EXPORT_SYMBOL(ceph_auth_destroy_authorizer);
 
diff --git a/net/ceph/auth_none.c b/net/ceph/auth_none.c
index 8c93fa8d81bc..5f836f02ae36 100644
--- a/net/ceph/auth_none.c
+++ b/net/ceph/auth_none.c
@@ -16,7 +16,6 @@ static void reset(struct ceph_auth_client *ac)
 	struct ceph_auth_none_info *xi = ac->private;
 
 	xi->starting = true;
-	xi->built_authorizer = false;
 }
 
 static void destroy(struct ceph_auth_client *ac)
@@ -39,6 +38,27 @@ static int should_authenticate(struct ceph_auth_client *ac)
 	return xi->starting;
 }
 
+static int ceph_auth_none_build_authorizer(struct ceph_auth_client *ac,
+					   struct ceph_none_authorizer *au)
+{
+	void *p = au->buf;
+	void *const end = p + sizeof(au->buf);
+	int ret;
+
+	ceph_encode_8_safe(&p, end, 1, e_range);
+	ret = ceph_entity_name_encode(ac->name, &p, end);
+	if (ret < 0)
+		return ret;
+
+	ceph_encode_64_safe(&p, end, ac->global_id, e_range);
+	au->buf_len = p - (void *)au->buf;
+	dout("%s built authorizer len %d\n", __func__, au->buf_len);
+	return 0;
+
+e_range:
+	return -ERANGE;
+}
+
 static int build_request(struct ceph_auth_client *ac, void *buf, void *end)
 {
 	return 0;
@@ -57,32 +77,32 @@ static int handle_reply(struct ceph_auth_client *ac, int result,
 	return result;
 }
 
+static void ceph_auth_none_destroy_authorizer(struct ceph_authorizer *a)
+{
+	kfree(a);
+}
+
 /*
- * build an 'authorizer' with our entity_name and global_id.  we can
- * reuse a single static copy since it is identical for all services
- * we connect to.
+ * build an 'authorizer' with our entity_name and global_id.  it is
+ * identical for all services we connect to.
  */
 static int ceph_auth_none_create_authorizer(
 	struct ceph_auth_client *ac, int peer_type,
 	struct ceph_auth_handshake *auth)
 {
-	struct ceph_auth_none_info *ai = ac->private;
-	struct ceph_none_authorizer *au = &ai->au;
-	void *p, *end;
+	struct ceph_none_authorizer *au;
 	int ret;
 
-	if (!ai->built_authorizer) {
-		p = au->buf;
-		end = p + sizeof(au->buf);
-		ceph_encode_8(&p, 1);
-		ret = ceph_entity_name_encode(ac->name, &p, end - 8);
-		if (ret < 0)
-			goto bad;
-		ceph_decode_need(&p, end, sizeof(u64), bad2);
-		ceph_encode_64(&p, ac->global_id);
-		au->buf_len = p - (void *)au->buf;
-		ai->built_authorizer = true;
-		dout("built authorizer len %d\n", au->buf_len);
+	au = kmalloc(sizeof(*au), GFP_NOFS);
+	if (!au)
+		return -ENOMEM;
+
+	au->base.destroy = ceph_auth_none_destroy_authorizer;
+
+	ret = ceph_auth_none_build_authorizer(ac, au);
+	if (ret) {
+		kfree(au);
+		return ret;
 	}
 
 	auth->authorizer = (struct ceph_authorizer *) au;
@@ -92,17 +112,6 @@ static int ceph_auth_none_create_authorizer(
 	auth->authorizer_reply_buf_len = sizeof (au->reply_buf);
 
 	return 0;
-
-bad2:
-	ret = -ERANGE;
-bad:
-	return ret;
-}
-
-static void ceph_auth_none_destroy_authorizer(struct ceph_auth_client *ac,
-				      struct ceph_authorizer *a)
-{
-	/* nothing to do */
 }
 
 static const struct ceph_auth_client_ops ceph_auth_none_ops = {
@@ -114,7 +123,6 @@ static const struct ceph_auth_client_ops ceph_auth_none_ops = {
 	.build_request = build_request,
 	.handle_reply = handle_reply,
 	.create_authorizer = ceph_auth_none_create_authorizer,
-	.destroy_authorizer = ceph_auth_none_destroy_authorizer,
 };
 
 int ceph_auth_none_init(struct ceph_auth_client *ac)
@@ -127,7 +135,6 @@ int ceph_auth_none_init(struct ceph_auth_client *ac)
 		return -ENOMEM;
 
 	xi->starting = true;
-	xi->built_authorizer = false;
 
 	ac->protocol = CEPH_AUTH_NONE;
 	ac->private = xi;
diff --git a/net/ceph/auth_none.h b/net/ceph/auth_none.h
index 059a3ce4b53f..62021535ae4a 100644
--- a/net/ceph/auth_none.h
+++ b/net/ceph/auth_none.h
@@ -12,6 +12,7 @@
  */
 
 struct ceph_none_authorizer {
+	struct ceph_authorizer base;
 	char buf[128];
 	int buf_len;
 	char reply_buf[0];
@@ -19,8 +20,6 @@ struct ceph_none_authorizer {
 
 struct ceph_auth_none_info {
 	bool starting;
-	bool built_authorizer;
-	struct ceph_none_authorizer au;   /* we only need one; it's static */
 };
 
 int ceph_auth_none_init(struct ceph_auth_client *ac);
diff --git a/net/ceph/auth_x.c b/net/ceph/auth_x.c
index 9e43a315e662..a0905f04bd13 100644
--- a/net/ceph/auth_x.c
+++ b/net/ceph/auth_x.c
@@ -565,6 +565,14 @@ static int ceph_x_handle_reply(struct ceph_auth_client *ac, int result,
 	return -EAGAIN;
 }
 
+static void ceph_x_destroy_authorizer(struct ceph_authorizer *a)
+{
+	struct ceph_x_authorizer *au = (void *)a;
+
+	ceph_x_authorizer_cleanup(au);
+	kfree(au);
+}
+
 static int ceph_x_create_authorizer(
 	struct ceph_auth_client *ac, int peer_type,
 	struct ceph_auth_handshake *auth)
@@ -581,6 +589,8 @@ static int ceph_x_create_authorizer(
 	if (!au)
 		return -ENOMEM;
 
+	au->base.destroy = ceph_x_destroy_authorizer;
+
 	ret = ceph_x_build_authorizer(ac, th, au);
 	if (ret) {
 		kfree(au);
@@ -643,16 +653,6 @@ static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac,
 	return ret;
 }
 
-static void ceph_x_destroy_authorizer(struct ceph_auth_client *ac,
-				      struct ceph_authorizer *a)
-{
-	struct ceph_x_authorizer *au = (void *)a;
-
-	ceph_x_authorizer_cleanup(au);
-	kfree(au);
-}
-
-
 static void ceph_x_reset(struct ceph_auth_client *ac)
 {
 	struct ceph_x_info *xi = ac->private;
@@ -770,7 +770,6 @@ static const struct ceph_auth_client_ops ceph_x_ops = {
 	.create_authorizer = ceph_x_create_authorizer,
 	.update_authorizer = ceph_x_update_authorizer,
 	.verify_authorizer_reply = ceph_x_verify_authorizer_reply,
-	.destroy_authorizer = ceph_x_destroy_authorizer,
 	.invalidate_authorizer = ceph_x_invalidate_authorizer,
 	.reset =  ceph_x_reset,
 	.destroy = ceph_x_destroy,
diff --git a/net/ceph/auth_x.h b/net/ceph/auth_x.h
index 40b1a3cf7397..21a5af904bae 100644
--- a/net/ceph/auth_x.h
+++ b/net/ceph/auth_x.h
@@ -26,6 +26,7 @@ struct ceph_x_ticket_handler {
 
 
 struct ceph_x_authorizer {
+	struct ceph_authorizer base;
 	struct ceph_crypto_key session_key;
 	struct ceph_buffer *buf;
 	unsigned int service;
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 32355d9d0103..40a53a70efdf 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -1087,10 +1087,8 @@ static void put_osd(struct ceph_osd *osd)
 	dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
 	     atomic_read(&osd->o_ref) - 1);
 	if (atomic_dec_and_test(&osd->o_ref)) {
-		struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
-
 		if (osd->o_auth.authorizer)
-			ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
+			ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
 		kfree(osd);
 	}
 }
@@ -2984,7 +2982,7 @@ static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
 	struct ceph_auth_handshake *auth = &o->o_auth;
 
 	if (force_new && auth->authorizer) {
-		ceph_auth_destroy_authorizer(ac, auth->authorizer);
+		ceph_auth_destroy_authorizer(auth->authorizer);
 		auth->authorizer = NULL;
 	}
 	if (!auth->authorizer) {